/Engine/Source/Runtime/Core/Public/GenericPlatform/GenericPlatformTime.h
Contains CPU utilization data.
struct FCPUTime
float
CPUTimePct
Percentage CPU utilization for the last interval.
float
CPUTimePctRelative
Percentage CPU utilization for the last interval relative to one core, so if CPUTimePct is 8.0% and you have 6 core this value will be 48.0%.